COUNTY WATER-SYSTEM LEDGER
Jefferson, Iowa
EPA’s September 2026 export lists 3 active community water systems serving Jefferson, Iowa, with 0 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Jefferson, Iowa
EPA associates 3 covered systems with Jefferson, Iowa; their reported population-served values total 60,084 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Rathbun Regional Water Assn (Rathbun)IA0400900 | 33,000 | Surface water | No current violation flagged |
| Wapello Rural Water Assoc.IA9000742 | 17,263 | Surface water purchased | No current violation flagged |
| Fairfield Water SupplyIA5131033 | 9,821 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Jefferson, Iowa
EPA classifies 3 systems serving Jefferson, Iowa across 3 primary-source categories; Surface water is the largest category with 1 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.